Agriculture and Agri-Food Canada
Dr. Usher is a phytochemist working on wine grape chemistry with Agriculture and Agri-Food Canada at the Summerland Research and Development Centre in British Columbia. His research focus is on vineyard management practices and site conditions and how they affect flavor, mouthfeel and aroma in grapes and wine. Dr. Usher has investigated the effects of canopy management, nitrogen application rates and timing, irrigation regimes, terroir, virus infection on the development of aromas and flavours in grapes and wine, micro-oxygenation with tannin and oak products, the sensory impacts of leaf petioles in wine and most recently leaf removal practices and their impact on fruit development and wine quality.